Features: Lightweight helmet for use when riding bikes, e-bikes, scooters, skateboards, and rollerblades MIPS(R) -Equipped with the Multi-Directional Impact Protection System, you not only stay cool but stay safe with extra protection and durability Poly-carbonate shell construction Adjustable dial fit system for a customizable and comfortable fit Aerodynamic cooling vents offer great airflow Classic 3-color retro stripe graphic around the rear of the helmet Fits most riders with heads measuring 21.3 in. - 22.8 in. (54 cm - 58 cm) Complies with the U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older